Display panel

ABSTRACT

A display panel includes a first substrate, a second substrate and a black matrix disposed between the first substrate and the second substrate. The first substrate includes a plurality of pixel areas arranged in a matrix. The first substrate further includes a plurality of scan lines extending along a first direction. The second substrate is disposed opposite to the first substrate. The black matrix includes a plurality of first parts and a second part. One of the plurality of first parts extends along the first direction and corresponds to one of the plurality of the scan lines. The second part is connected to the one of the plurality of first parts and extends along a second direction. A thickness of the second part is varied along the second direction.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a Divisional Application (DA) of U.S. Ser. No.17/038,860, filed on Sep. 30, 2020, which is a Divisional Application(DA) of U.S. Ser. No. 16/510,159, filed on Jul. 12, 2019, which is aDivisional Application (DA) of U.S. Ser. No. 15/645,471, filed on Jul.10, 2017, which is a continuation application (CA) of U.S. Ser. No.14/729,661, filed on Jun. 3, 2015, which claims priority under 35 U.S.C.§ 119(a) on Patent Application No(s). 103122681, filed in Taiwan,Republic of China on Jul. 1, 2014, the entire contents of which arehereby incorporated by reference.

BACKGROUND Field of Invention

The disclosure relates to a display panel.

Related Art

The display panel is popularized and matured in technology nowadays, andrecently the development direction thereof is towards the higherresolution, lower power consumption and larger size. One of the factorsthat affects the resolution is the uneven surface of the color filtermaterial, which will cause a reduced transmittance. Furthermore, theabove factor will also become more prominent when the pixel size isgetting smaller and smaller (i.e. the smaller interval of the blackmatrix).

FIG. 1A is a schematic enlarged diagram of a second substrate of aconventional display panel, and FIG. 1B is a schematic enlarged diagramof the region A1 in FIG. 1A.

As shown in FIGS. 1A and 1B, the conventional display panel at leastincludes a first substrate (not shown), a display medium (not shown), asecond substrate S2, a black matrix B and a color filter material C. Thecolor filter material C is disposed between the black matrix B bycorresponding to each of the pixel areas (not shown). It is clear fromthe figure that the color filter material C has a height difference atthe overlap of the color filter material C and the black matrix B, andthe height difference at the overlap of the color filter material C andthe black matrix B will result in the scattered light. Therefore, if theheight difference at the overlap of the color filter material C and theblack matrix B has a larger proportion of the color filter material C,the transmittance will be reduced more.

By taking a full HD product as an example, the ratio of the flat portionto bulge portion is about 86/14 for the portion of the color filtermaterial C corresponding to a single sub-pixel. Moreover, for the WQHDproduct having a higher resolution and a smaller sub-pixel than the fullHD product, the ratio of the flat portion to the bulge portion for theportion of the color filter material C corresponding to a singlesub-pixel will be reduced to 82/18. Furthermore, for the recentlydeveloped 4K2K product of high resolution, the ratio of the flat portionto the bulge portion for the portion of the color filter material Ccorresponding to a single sub-pixel will be even reduced to 72/28.

So, due to the increased resolution and less size of sub-pixel, thebulge C1 of the color filter material C at the vicinity to the blackmatrix B will become more significant for the transmittance.

In addition to the above problem, the smaller sub-pixel (smallerinterval of the black matrix) also will cause the developer solution tobe easily left between the black matrixes during the process, andtherefore the photoresist will be hard to be completely clean and thecarbon will be left. This problem also affects the transmittance of thedisplay panel.

Therefore, it is an important subject to provide a display panel withthe black matrix structure which can achieve a higher transmittance,when applied to a high-resolution product, and a reduced amount of thecarbon remaining between the black matrixes during the process.

SUMMARY

An objective of the disclosure is to provide a display panel which canachieve a higher transmittance, when applied to a high-resolutionproduct, and a reduced amount of the carbon remaining between the blackmatrixes during the process.

To achieve the above objective, a display panel according to thedisclosure comprises a first substrate, a second substrate and a blackmatrix disposed between the first substrate and the second substrate.

The first substrate includes a plurality of pixel areas arranged in amatrix, and each of the pixel areas has a plurality of sub-pixel areas.The second substrate is disposed on the first substrate.

The black matrix comprises a plurality of row shading bars and aplurality of column shading bars. The row shading bars are disposedbetween the two adjacent pixel areas and extend along a first direction,and at least one of the row shading bars has a first thickness. Thecolumn shading bars are disposed between the two adjacent sub-pixelareas and extend along a second direction, and at least one of thecolumn shading bars has a second thickness. The second thickness isdifferent from the first thickness and the first direction is differentfrom the second direction.

In one embodiment, the second thickness is less than the firstthickness.

In one embodiment, the row shading bars are connected to at least a partof the column shading bars.

In one embodiment, the column shading bars disposed between the twoadjacent row shading bars are separated from the two adjacent rowshading bars.

In one embodiment, the column shading bars disposed between the twoadjacent row shading bars are connected to one of the two adjacent rowshading bars.

In one embodiment, the widths of the column shading bars along the firstdirection are varied along the second direction.

In one embodiment, the second thicknesses of the column shading bars arevaried along the second direction.

In one embodiment, the column shading bars include a first columnshading bar and a second column shading bar, the first column shadingbar has a third thickness, the second column shading bar has a fourththickness, and the third thickness is greater than the fourth thickness,and the third thickness of the first column shading bar is less than orequal to the first thickness of the row shading bar.

In one embodiment, the first thickness is between 1.2 μm and 2.0 μm.

In one embodiment, the second thickness is between 0.5 μm and 1.0 μm.

In one embodiment, the display panel further comprises a plurality ofcolor filter blocks, each of which is disposed between the two adjacentcolumn shading bars.

In one embodiment, an end of one of the column shading bars disposedbetween the two adjacent row shading bars is connected to one of the twoadjacent row shading bars, and another end of the one of column shadingbars is separated from the other one of the two adjacent row shadingbars.

In one embodiment, two ends of one of the column shading bars disposedbetween the two adjacent row shading bars are connected to the twoadjacent row shading bars, and the width of the two ends of the one ofthe column shading bars are less than the width of a central part of theone of the column shading bars.

In one embodiment, the column shading bars include a third columnshading bar and a fourth column shading bar disposed between the twoadjacent row shading bars, the third column shading bar is adjacent tothe fourth shading bar, the third column shading bar is separated fromone of the two adjacent row shading bars, and the fourth column shadingbar is separated from the other one of the two adjacent row shadingbars.

In one embodiment, the adjacent two first column shading bars aredisposed on the opposite sides of one of the sub-pixel areas.

As mentioned above, this disclosure adjusts the thickness, shape andlayout of the column shading bars of the black matrix to make the pixelareas evener. Thereby, the developer solution or carbon will be noteasily left in the pixel areas during the process, and the remainingphotoresist problem can be reduced. Therefore, the transmittance of thehigh-resolution product can be enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure will become more fully understood from the detaileddescription and accompanying drawings, which are given for illustrationonly, and thus are not limitative of the present disclosure, andwherein:

FIG. 1A is a schematic enlarged diagram of a second substrate of aconventional display panel;

FIG. 1B is a schematic enlarged diagram of the region A1 in FIG. 1A;

FIG. 2A is a schematic exploded diagram of a display panel of anembodiment of the disclosure;

FIG. 2B is a schematic enlarged diagram of the first substrate in FIG.2A;

FIG. 3 is a schematic partial enlarged diagram of the color filter blockand the black matrix in FIG. 2A according to the first embodiment of thedisclosure;

FIG. 4A is a schematic partial enlarged diagram of the second substrateof the display panel of this embodiment;

FIG. 4B is a schematic enlarged diagram of the region A2 in FIG. 4A;

FIG. 5A is a schematic diagram of the black matrix according to thesecond embodiment of the disclosure;

FIG. 5B is a schematic top-view diagram of the black matrix according tothe second embodiment of the disclosure;

FIG. 6 is a schematic top-view diagram of the black matrix according tothe third embodiment of the disclosure;

FIG. 7 is a schematic top-view diagram of the black matrix according tothe fourth embodiment of the disclosure;

FIG. 8 is a schematic top-view diagram of the black matrix according tothe fifth embodiments of the disclosure;

FIG. 9 is a schematic top-view diagram of the black matrix according tothe sixth embodiments of the disclosure;

FIG. 10 is a schematic top-view diagram of the black matrix according tothe seventh embodiments of the disclosure;

FIG. 11 is a schematic diagram of the black matrix of the eighthembodiment of the disclosure; and

FIG. 12 is a schematic diagram of the black matrix of the ninthembodiment of the disclosure.

DETAILED DESCRIPTION OF THE INVENTION

The present disclosure will be apparent from the following detaileddescription, which proceeds with reference to the accompanying drawings,wherein the same references relate to the same elements.

To be noted, the following embodiments shown in the figures are just forthe illustrative purpose but not for representing the actual dimensionsand size relation.

As shown in FIGS. 2A and 2B, a display panel 1 can at least include afist substrate 100, a second substrate 120 and a black matrix 130. Thedisplay panel 1 can further include a display medium 110 disposedbetween the first substrate 100 and the second substrate 120. Thedisplay medium 110 can be liquid crystal material, plasma material ororganic electroluminescent material for example. Therefore, withdifferent types of the display medium 110, the display panel 1 can be aliquid crystal display panel, plasma display panel or organic lightemitting display panel. The liquid crystal display panel will be takenas an example in the following embodiments, but those skilled in the artcan analogize other display panels.

The first substrate 100 can be an active array substrate, but thisdisclosure is not limited thereto. The first substrate 100 includes aplurality of scan lines 100 a and a plurality of data lines 100 b whichcross each other. The scan lines 100 a and the data lines 100 b aresubstantially perpendicular to each other to define a pixel matrix 101including a plurality of pixel areas 1012. The pixel areas 1012 arearranged in a matrix, and each of the pixel area 1012 has a plurality ofsub-pixel areas 1012 a, 1012 b, 1012 c. In other words, in thisembodiment, the sub-pixel areas 1012 a, 1012 b, 1012 c can form a pixelarea 1012.

Besides, those skilled in the art can comprehend that the patternedconductive layer includes a plurality of thin film transistors 100 c anda plurality of pixel electrodes 100 d.

The second substrate 120 is disposed on the first substrate 100. Herein,the second substrate 120 and the first substrate 100 are disposedoppositely, and that is, the second substrate 120 is disposed on theopposite side of the first substrate 100.

The first substrate 100 or second substrate 120 of this embodiment canbe made by glass, quartz, organic polymer or other applicable material.

Besides, the display panel 1 can further include an electrode layer 111.The liquid crystal molecules of the display medium 110 can be driven bythe electric field formed by the electrode layer 111 and the pixelmatrix 101 to achieve different display effects.

The black matrix 130 is disposed between the first substrate 100 and thesecond substrate 120. Furthermore, the black matrix 130 is disposedbetween the second substrate 120 and the display medium 110. The blackmatrix 130 includes a plurality of row shading bars 131 and a pluralityof column shading bars 132. Each of the row shading bars 131 is disposedcorresponding to the position between the two adjacent rows of the pixelareas 1012, and for example, corresponding to the scan line 100 a of thefirst substrate 100. The column shading bars 132 are disposed betweenthe two adjacent row shading bars 131 and disposed corresponding to theposition between the two adjacent sub-pixel areas 1012 a, 1012 b, 1012c. For example, some of the column shading bars 132 are disposedcorresponding to the data lines 100 b of the first substrate 100.Moreover, the scan lines 100 a and the data lines 100 b of the firstsubstrate 100 cross each other and are substantially perpendicular toeach other.

The black matrix 130 is made by black resin and formed into a gridstructure for shading the light. The black matrix 130 can be disposedcorresponding to the pixel matrix 101, and each of the meshes of thegrid structure of the black matrix 130 is disposed corresponding to apixel area or sub-pixel area of the first substrate 100. The detailedstructure of the black matrix 130 will be illustrated later.

The display panel 1 of this embodiment can further include the colorfilter blocks 114 disposed between the display medium 110 and the secondsubstrate 120. The color filter blocks 114 are disposed corresponding tothe pixel areas 1012. The color filter blocks 114 can be the combinationof red color filter blocks, green color filter blocks and blue colorfilter blocks. In other embodiments, the color filter blocks 114 mayhave another colorful combination, as long as the full color displayeffect can be achieved.

The structure of the black matrix layer is illustrated below.

FIG. 3 is a schematic partial enlarged diagram of the color filter blockand the black matrix in FIG. 2A according to the first embodiment of thedisclosure, FIG. 4A is a schematic partial enlarged diagram of thesecond substrate of the display panel of this embodiment, and FIG. 4B isa schematic enlarged diagram of the region A2 in FIG. 4A.

As shown in FIGS. 3, 4A, 4B, the black matrix 130 can be applied to thedisplay panel and includes a plurality of row shading bars 131 and aplurality of column shading bars 132. The row shading bars 131 connectto the column shading bars 132 correspondingly. Each of the columnshading bars 132 is disposed between the two adjacent row shading bars131, and two ends of the column shading bar 132 connect to the twoadjacent row shading bars 131.

The row shading bars 131 extend towards the X direction (the firstdirection) and has a first thickness h₁. Each of the row shading bars131 is disposed corresponding to the position between the two adjacentrows of the pixel areas of the pixel matrix (not shown).

The column shading bars 132 extend towards the Y direction (the seconddirection) and has a second thickness h₂. Each of the column shadingbars 132 is disposed corresponding to the position between the twoadjacent sub-pixel areas. The second thickness h₂ is different from thefirst thickness h₁. In this embodiment, the second thickness h₂ is lessthan the first thickness h₁, and the X direction (the first direction)and the Y direction (the second direction) are substantiallyperpendicular to each other. In this embodiment, the first direction isdifferent from the second direction.

Furthermore, the row shading bars 131 of this embodiment are disposedcorresponding to the scan lines of the first substrate 100, and thecolumn shading bars 132 are disposed corresponding to the data lines ofthe first substrate 100. Besides, the scan lines and data lines of thefirst substrate 100 cross each other.

In this embodiment, the first thickness h₁ of the row shading bar 131can be between 1.2 μm and 2.0 μm, and the second thickness h₂ of thecolumn shading bar 132 can be between 0.5 μm and 1.0 μm.

In other words, the second thickness h₂ of the column shading bar 132can be adjusted in this embodiment so as to be less than the firstthickness h₁, and therefore when the color filter blocks 114 aredisposed on the black matrix 130, the overlap 114 b of the color filterblocks 114 and the black matrix 130 will have a less proportion than theflat portion 114 a of the color filter block 114 corresponding to asingle pixel area (sub-pixel area). Hence, the surface of the colorfilter block 114 will be more even (also referring to FIG. 1B). Thereby,the light will be less scattered and shifted when passing through thecolor filter blocks 114 so that the transmittance of the display panelcan be enhanced.

In this embodiment, the row shading bar 131 and column shading bar 132of the black matrix 130 can be formed with two different thicknesses bythe halftone mask or optical proximity correction (OPC) mask.

Moreover, this embodiment only adjusts the second thickness h₂ of thecolumn shading bar 132, so that the light shading ability of the rowshading bar 131 and column shading bar 132 won't be affected and theentire optical density also won't be affected. Therefore, the entirecontrast also won't be affected.

Then, refer to FIGS. 5A and 5B, which are schematic perspective andtop-view diagrams of the black matrix according to the second embodimentof the disclosure.

Like the first embodiment of FIG. 3, the black matrix 230 of thisembodiment includes a plurality of row shading bars 231 and a pluralityof column shading bars 232. The row shading bars 231 have a firstthickness h₁. The column shading bars 232 have a second thickness h₂.The second thickness h₂ is less than the first thickness h₁.

The main difference from the above embodiment is that each of the columnshading bars 232 disposed between the two adjacent row shading bars 231is connected to one of the two adjacent row shading bars 231. In otherwords, one end of the column shading bar 232 is connected to one of theadjacent row shading bars 231, but the other end is separated from theother adjacent row shading bar 231. In this embodiment, the connectionof the two adjacent row shading bars 231 and the column shading bars 232is implemented in an alternate manner. The column shading bars 232include a third column shading bar and a fourth column shading bardisposed between the two adjacent row shading bars 231, the third columnshading bar is adjacent to the fourth shading bar, the third columnshading bar is separated from one of the two adjacent row shading bars231, and the fourth column shading bar is separated from the other oneof the two adjacent row shading bars 231. For example, the odd-numberedcolumn shading bars 232 are connected to one of the two adjacent rowshading bars 231, and the even-numbered column shading bars 232 areconnected to the other one of the two adjacent row shading bars 231.

As shown in FIG. 5B, a gap G is formed between the column shading bar232 and the row shading bars 231, and can be between 0.5 μm and 5.0 μmaccording to different requirements. The gap G of this embodiment is 3.0μm, but this disclosure is not limited thereto.

The advantage of this embodiment is that the flow guiding channels canbe formed during the process to allow the developer solution to flow outeasily, so that the remaining carbon and photoresist will be avoided andthe transmittance of the display panel can be thus enhanced.

The disposition and effect of other elements can be comprehended byreferring to the above embodiment and therefore are not described herefor conciseness.

FIGS. 6 and 7 are schematic top-view diagrams of the black matrixaccording to the third embodiment and fourth embodiment of thedisclosure.

Like the second embodiment, the black matrix 330 of the third embodimentincludes a plurality of row shading bars 331 and a plurality of columnshading bars 332. The row shading bars 331 have a first thickness (notshown). The column shading bars 332 have a second thickness (not shown).The second thickness is less than the first thickness. Moreover, the rowshading bars 331 of this embodiment are connected to a part of thecolumn shading bars 332, and that is, one end of the column shading bar332 is connected to the row shading bar 331 but the other end isseparate from the other row shading bars 331.

The main difference from the second embodiment is that the columnshading bars 332 disposed between the two adjacent row shading bars 331are connected to one of the two adjacent row shading bars 331 at thesame side and are separated from the other one of the two adjacent rowshading bars 331 at the other side, so that the gaps G are formed on thesame side.

The black matrix 430 of the fourth embodiment also includes a pluralityof row shading bars 431 and a plurality of column shading bars 432. Therow shading bars 431 have a first thickness (not shown). The columnshading bars 432 have a second thickness (not shown). The secondthickness is less than the first thickness.

The main difference from the second and third embodiments is that thecolumn shading bars 432 disposed between the two adjacent row shadingbars 431 are separated from the two adjacent row shading bars 431.

The disposition and effect of other elements can be comprehended byreferring to the above embodiments and therefore are not described herefor conciseness.

FIGS. 8 to 10 are schematic top-view diagrams of the black matrixaccording to the fifth, sixth and seventh embodiments of the disclosure.

Refer to the fifth embodiment shown in FIG. 8. Like the first embodimentin FIG. 3, the black matrix 530 of the this embodiment includes aplurality of row shading bars 531 and a plurality of column shading bars532. The row shading bars 531 have a first thickness (not shown). Thecolumn shading bars 532 have a second thickness (not shown). The secondthickness is less than the first thickness.

The main difference from the first embodiment is that the two ends ofthe column shading bars 532 disposed between the two adjacent rowshading bars 531 are connected to the two adjacent row shading bars 531,and the width w of the column shading bars 532 varies along the Ydirection (the second direction). Herein for example, the width of thetwo ends of the one of the column shading bars 532 are less than thewidth of a central part of the one of the column shading bars 532. Indetail, the two ends of the column shading bar 532 at the vicinity tothe row shading bars 531 have a narrower width, so that the developersolution can flow out more easily. Therefore, the remaining carbon andphotoresist will be reduced or avoided and the transmittance of thedisplay panel can be thus enhanced.

Then, refer to the sixth embodiment of FIG. 9. Like the fifthembodiment, the black matrix 630 of the this embodiment includes aplurality of row shading bars 631 and a plurality of column shading bars632. The row shading bars 631 have a first thickness (not shown). Thecolumn shading bars 632 have a second thickness (not shown). The secondthickness is less than the first thickness.

The main difference from the fifth embodiment is that only one end ofthe column shading bar 632 of this embodiment at the vicinity to the rowshading bar 631 has a narrower width. Besides, the narrower ends of thecolumn shading bars 632 are disposed in an alternate manner.

Then, refer to the seventh embodiment of FIG. 10. Like the fifthembodiment, the black matrix 730 of the this embodiment includes aplurality of row shading bars 731 and a plurality of column shading bars732. The row shading bars 731 have a first thickness (not shown). Thecolumn shading bars 732 have a second thickness (not shown). The secondthickness is less than the first thickness.

The main difference from the fifth embodiment is that only one end ofthe column shading bar 732 of this embodiment at the vicinity to the rowshading bar 731 has a narrower width. Besides, the narrower ends of thecolumn shading bars 732 are disposed at the same side.

The disposition and effect of other elements can be comprehended byreferring to the above embodiments and therefore are not described herefor conciseness.

FIG. 11 is a schematic diagram of the black matrix of the eighthembodiment of the disclosure.

As shown in FIG. 11, like the first embodiment of FIG. 3, the blackmatrix 830 of the this embodiment includes a plurality of row shadingbars 831 and a plurality of column shading bars 832. The main differencefrom the first embodiment is that the row shading bars 831 have a firstthickness, and the column shading bars 832 have different thicknesseswhich are less than or equal to the thickness of the row shading bars831.

In this embodiment, the row shading bars 831 have a first thickness h₁.The column shading bars 832 include a first column shading bar 832 a anda second column shading bar 832 b. The first column shading bar 832 ahas a third thickness h₃, and the second column shading bar 832 b has afourth thickness h₄. The third thickness h₃ is greater than the fourththickness h₄, and is less than or equal to the first thickness h₁.

The first column shading bar 832 a and the second column shading bar 832b are disposed corresponding to the positions between the adjacentsub-pixel areas 1012 a, 1012 b, 1012 c. The above disposition has anadvantage of reducing the optical interference between the unit pixels1012.

In order to help understanding the relative positions of the pixel areas1012, sub-pixel areas 1012 a, 1012 b, or 1012 c, row shading bars 831and column shading bars 832, the positions of the pixel area 1012 andsub-pixel areas 1012 a, 1012 b, 1012 c are marked by the dotted line.

In this embodiment, the first column shading bar 832 a is disposedbetween the two adjacent row shading bars 831 and between the twoadjacent pixel areas 1012. The second column shading bars 832 b aredisposed between the two first column shading bars 832 a and between thetwo adjacent sub-pixel areas 1012 a, 1012 b, or 1012 c. In thisembodiment, the color mix problem between the pixel areas 1012 can beavoided by the disposition of the first column shading bars 832 a.

In another embodiment, the first column shading bars 832 a can bedisposed between the two adjacent row shading bars 831 and on theopposite sides of the single sub-pixel area, for example, the redsub-pixel area 1012 a. Since the human eye is more sensitive to the redcolor mix, such disposition can avoid the color mix of the red colorwith other colors of the sub-pixel areas.

To be noted, although this embodiment shows the column shading bars ofthe two thicknesses, another embodiment may show the regular orirregular variation of the second thicknesses of the column shadingbars. For example, the adjacent thicknesses are different, or thethickness of the adjacent column shading bars have a periodic variation.

The disposition and effect of other elements can be comprehended byreferring to the above embodiments and therefore are not described herefor conciseness.

FIG. 12 is a schematic diagram of the black matrix of the ninthembodiment of the disclosure.

As shown in FIG. 12, like the first embodiment of FIG. 3, the blackmatrix 930 of the this embodiment includes a plurality of row shadingbars 931 and a plurality of column shading bars 932. The row shadingbars 931 have a first thickness. The column shading bars 932 have asecond thickness. The second thickness is less than the first thickness.

The main difference from the first embodiment is that the secondthicknesses of the column shading bars 932 are varied along the Ydirection (the second direction). Herein for example, the thickness ofthe column shading bar 932 is lessened at the connection with the rowshading bar 931 to form a sectional difference 9321. Such design alsocan achieve the similar effect of the flow guiding channel as theabove-mentioned second and third embodiments.

Although this embodiment shows the sectional difference 9321 of thecolumn shading bar 932 is disposed at the connection, the position ofthe sectional difference is not limited thereto and another embodimentmay show the periodic variation of the thickness of the column shadingbar to form a wave-like column shading bar.

The disposition and effect of other elements can be comprehended byreferring to the above embodiments and therefore are not described herefor conciseness.

Summarily, this disclosure adjusts the thickness, shape and layout ofthe column shading bars of the black matrix to make the pixel areasevener. Thereby, the developer solution or carbon will be not easilyleft in the pixel areas during the process, and the remainingphotoresist problem can be reduced. Therefore, the transmittance of thehigh-resolution product can be enhanced.

Although the disclosure has been described with reference to specificembodiments, this description is not meant to be construed in a limitingsense. Various modifications of the disclosed embodiments, as well asalternative embodiments, will be apparent to persons skilled in the art.It is, therefore, contemplated that the appended claims will cover allmodifications that fall within the true scope of the disclosure.

What is claimed is:
 1. A display panel, comprising: a first substrateincluding a plurality of scan lines, wherein the plurality of scan linesextend along a first direction; a second substrate disposed opposite tothe first substrate; and a black matrix disposed between the firstsubstrate and the second substrate, and comprising: a plurality of firstparts, wherein one of the plurality of first parts extends along thefirst direction and corresponds to one of the plurality of the scanlines; and a second part connected to the one of the plurality of firstparts and extending along a second direction, wherein the seconddirection is different from the first direction, wherein a thicknessesof the second part is varied along the second direction.
 2. The displaypanel as recited in claim 1, wherein the first distance is less than thesecond distance.
 3. The display panel as recited in claim 1, wherein athickness of the one of the plurality of first part is between 1.2 μmand 2.0 μm.
 4. The display panel as recited in claim 1, wherein athickness of the second part is between 0.5 μm and 1.0 μm.
 5. Thedisplay panel as recited in claim 1, further comprising a color filterblock, wherein a region of the color filter block overlapping the blackmatrix defines an overlap of the color filter block.
 6. The displaypanel as recited in claim 5, wherein the color filter block furthercomprises a flat portion connecting to the overlap of the color filterblock, and a distance between a surface of the flat portion of the colorfilter block and a surface of the first substrate is less than adistance between a surface of the overlap of the color filter block andthe surface of the first substrate.
 7. The display panel as recited inclaim 1, wherein the second substrate has a first surface closer to thefirst substrate, the one of the plurality of first parts has a secondsurface closer to the first surface, and the second part has a thirdsurface closer to the first surface, wherein a vertical distance fromthe second surface to the first surface is defined as a first distance,a vertical distance from the third surface to the first surface definesas a second distance, and the second distance is different from thefirst distance.
 8. The display panel as recited in claim 1, wherein thesecond part is separated from another one of the plurality of firstparts adjacent to the one of the plurality of first parts.